【单选题】可编程逻辑控制器的图形化编程语言称为()
【单选题】--Listen! Who is singing? --It's Betty. She has a sweet____________. A. sound B. voice C. noise D. speech
【单选题】— ______________ is singing? — I think it's Linda. [ ]
【单选题】听力原文:M: Look! Who is behind the tree? W: It's Li Ming. He is reading there. Q: What's Li Ming doing? (24)